NOISY fisher paykel DD603 motor Problem. pulled the impeller,center ring and outer ring and discovered there was wear on the bottom spindles. do I need a new motor assembly?

It could be as simple as something just poking out of the pipe from the filter to the impellor, big enough to get through the filter, but not big enough to be moved out by the impellor, remove the filter, and the impellor, and poke something through the pipe, a drinking straw or such like will work...

It depends on how bad the wear is. You can trim the roughness off the impellor with a craft knife. Also check the stator impellor housing for damage as well and try to flatten or scrape off any bits of roughness where it shouldnt be. Make sure the motor impellor is pressed firmly together before re-fitting to the stator.

Hope this helps